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CVE-2016-4020

CVE-2016-4020

EPSS 0.4%
The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR).
Affected products
n/a · n/a

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References
http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=691a02e2ce0c413236a78dee6f2651c937b09fb0https://access.redhat.com/errata/RHSA-2017:1856https://access.redhat.com/errata/RHSA-2017:2392https://access.redhat.com/errata/RHSA-2017:2408https://bugzilla.redhat.com/show_bug.cgi?id=1313686https://lists.debian.org/debian-lts-announce/2018/11/msg00038.htmlhttps://lists.gnu.org/archive/html/qemu-devel/2016-04/msg01106.htmlhttps://lists.gnu.org/archive/html/qemu-devel/2016-04/msg01118.htmlhttps://security.gentoo.org/glsa/201609-01http://www.securityfocus.com/bid/86067http://www.ubuntu.com/usn/USN-2974-1